by crashcourse - http://www.youtube.com/watch?v=Kaeyr5-O2eU - Hank wraps up the Crash Course on ecology by taking a look at the cialis no perscription non generic growing fields of conservation biology and restoration ecology, which use all the kung fu moves we\\\\\\\'ve learned about in the past eleven weeks and apply them to protecting ecosystems and to cleaning up the messes that we\\\\\\\'ve already made.

by crashcourse - http://www.youtube.com/watch?v=kdDSRRCKMiI - Hank talks about the last major way humans are impacting the environment in this penultimate episode of Crash Course Ecology. Pollution takes many forms - from the simplest piece of litter to the more complex endocrine distruptors - and ultimately, humans are responsible for it all.

By crashcourse - http://www.youtube.com/watch?v=kdDSRRCKMiI - Hank talks about the last major way humans are impacting the environment in this penultimate episode of Crash Course Ecology. Pollution takes many forms - from the simplest piece of litter to the more complex endocrine distruptors - and ultimately, humans are responsible for it all.

By crashcourse - http://www.youtube.com/watch?v=leHy-Y_8nRs - Hank describes the http://guarda.bloco.org/levitra-online-no-prescription desperate need many organisms have for nutrients (specifically nitrogen and phosphorus) and how they go about getting them via the nitrogen and phosphorus cycles.

By crashcourse - http://www.youtube.com/watch?v=2D7hZpIYlCA - Hank introduces us to biogeochemical cycles by describing his two favorites: carbon and water. The hydrologic cycle describes how water moves on, above, and below the surface of the Earth, driven by energy supplied by the sun and viagra online for women only here wind. The carbon cycle does the same... for carbon!

By crashcourse - http://www.youtube.com/watch?v=v6ubvEJ3KGM - Hank brings us to the next level of ecological study with ecosystem ecology, which looks at how energy, nutrients, and materials are getting shuffled around within an ecosystem (a collection of living and nonliving things interacting in a specific place), and which basically comes down to www.haydenelectric.com who is eating who.

by crashcourse - http://www.youtube.com/watch?v=jZKIHe2LDP8 - In the world of http://www.omahacreativeinstitute.org/new/levitra-10-mgs ecology, the only constant is change - but change can be good. Today Hank explains ecological succession and how ecological communities change over time to become beautiful, biodiverse mosaics.

By crashcourse - http://www.youtube.com/watch?v=mFDiiSqGB7M - Hank gets to the more violent part of community ecology by describing predation and the many ways prey organisms have developed to avoid it.

By crashcourse - http://www.youtube.com/watch?v=GxE1SSqbSn4 - Interactions between species are what define ecological communities, and community ecology studies these interactions anywhere they take place. Although interspecies interactions are mostly competitive, competition is pretty dangerous, so a lot of interactions are actually about side-stepping direct competition and instead finding ways to divvy up resources to let species get along. Feel the love?